rc.d/mountlate: discard output from nextboot
silent the warning seen at boot:
Mounting late filesystems:. nextboot: unlink /boot/nextboot.conf: No such file or directory Sun Feb 18 23:31:52 AKST 2024 FreeBSD/amd64 (main) (ttyv0) login:
Differential Revision: https://reviews.freebsd.org/D43979